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Finding the Fourth Proportional to 129,454.43, 193,932.86 and 79,388.53

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Solution

The fourth proportional to 129,454.43, 193,932.86 and 79,388.53 is: 118,930.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,454.43 : 193,932.86 = 79,388.53 : x
  2. Step 2: Convert to fraction form
    129,454.43/193,932.86 = 79,388.53/x
  3. Step 3: Cross multiply
    129,454.43x = 193,932.86 × 79,388.53
  4. Step 4: Simplify right side
    129,454.43x = 15,396,043,792.32
  5. Step 5: Solve for x
    x = 15,396,043,792.32/129,454.43
  6. Step 6: Final answer
    x = 118,930.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.